to sign up for the affordable care act. a blitz that is. coming up, a look at what you may be seeing is or hearing the next three weeks. >>> the mayors race in >>> our tom sherwood is following up on a story he was first to report yesterday. mayor vincent gray is running for reelection. many people have been wondering for more than a year if he would seek a second term. federal prosecutors are still looking into his 2010 campaign. four people pleaded guilty to running a shadow campaign that helped him get elected. gray, though, is not facing any charges. >> our record speaks for itself. look at the fiscal stability, education, the way people are getting back to work. >> some of gray's opponents are already criticizing him for running again. tommy wells says the mayor doesn't deserve a second chance because he ran a corrupt campaign. >> and new, vice president joe biden is taking a stance against china's air defense zone. earlier today he held a press conference. biden told the u.s. he is deeply concerned about china's attem